Dynamic connector for spinal device

Abstract

The present invention provides a dynamic stabilization device positionable about a portion of a spinal column. The stabilization device may generally include a first component and a second component, where the first and second components are movably coupled to one another to define an arcuate path of motion. The stabilization device may also include one or more adjustment elements positionable within first and second adjustment openings to affect the path of motion between the first and second components and/or the behavior and characteristics of the movement. In addition, one or more resistive elements may be adjustably positionable within either and/or both of the first and second adjustment openings to provide resistance and/or dampening of the forces experienced as the first and second components move relative to one another. The stabilization device may further define a joint having three degrees of freedom to adapt to movement of a spinal column.

What is claimed is: 
     
       1. A connector facilitating engagement of a spinal prosthesis to a portion of a spinal segment, comprising:
 a connector housing defining a passage for receiving at least a portion of the spinal prosthesis therein; and 
 a collar portion coupled to the connector housing to define a ball-and-socket joint, wherein the passage extends through a portion of the ball-and-socket joint, the collar portion defining an elongated body portion substantially perpendicular to the passage and engageable with a bone affixation element. 
 
     
     
       2. The connector according to  claim 1 , wherein the collar portion defines a curved opening for movably receiving a curved portion of the connector housing therein. 
     
     
       3. The connector according to  claim 1 , wherein the connector housing includes a locking element to secure at least a portion of the spinal prosthesis in the passage. 
     
     
       4. The connector according to  claim 3 , wherein the locking element includes a set screw. 
     
     
       5. The connector according to  claim 1 , wherein the elongated body portion includes a cylindrically-shaped rod. 
     
     
       6. The connector according to  claim 1 , wherein the bone affixation element is a pedicle screw.